EP2418864A2 - Dual view display system - Google Patents
Dual view display system Download PDFInfo
- Publication number
- EP2418864A2 EP2418864A2 EP11175512A EP11175512A EP2418864A2 EP 2418864 A2 EP2418864 A2 EP 2418864A2 EP 11175512 A EP11175512 A EP 11175512A EP 11175512 A EP11175512 A EP 11175512A EP 2418864 A2 EP2418864 A2 EP 2418864A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- display
- time period
- display surface
- accordance
- optical element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000009977 dual effect Effects 0.000 title claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims description 32
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000000188 Vaccinium ovalifolium Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/22—Display screens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/14—Advertising or display means not otherwise provided for using special optical effects displaying different signs depending upon the view-point of the observer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/1526—Dual-view displays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K37/00—Dashboards
- B60K37/20—Dashboard panels
Definitions
- the invention generally relates to displays for displaying images or information, and more particularly relates to a system that time-multiplexes a single display with different images, and uses one or more optical elements in cooperation with light valves or shutter devices to display different images in different directions from the same display.
- Dual view displays capable of showing different images to distinct persons viewing the display from different directions have been proposed. Such displays can, for example, display navigation information to a vehicle operator while displaying a movie to a passenger.
- Some of the known dual view displays use a parallax barrier or patterned barrier to allow selected pixels on a display to be viewed from one direction and blocked when viewed from another direction. A description of such displays can be found in United States Patent Application Publication Number 2008/0001849 published Jan. 3, 2008 by Jin et al. and 2008/0061305 published March 13, 2008 by Kim et al .
- Other dual view displays use a segmented backlighting source that directs light or emits light in a particular direction toward selected pixels by emitting light through apertures.
- the apertures are aligned with the pixels such that when the selected pixels are viewed from that particular direction, the selected pixels are more apparent than when viewed from another direction.
- a description of such a display can be found in United States Patent Number 7,671,935 issued on March 2, 2010 to Mather et al .
- prior art devices rely on parallax angles and interlacing of images to display distinct images in different directions, and so when two images are displayed the resolution of each image is half of the resolution of the display.
- the direction that each image is displayed depends on careful control of lateral alignment and separation distance between the pixels and the parallax barrier or segmented backlighting source.
- Described herein is a dual view display system that uses an optical element overlaying the display to direct an image on the display in two distinct directions, and two shutter devices operated in coordination with multiplexing images on the display so distinct images can be displayed in the distinct directions.
- a dual view display system includes a display device, an optical element, a first shutter device, and a second shutter device.
- the display device is configured to display a first image on a display surface during a first time period and display a second image on the display surface during a second time period distinct from the first time period.
- the optical element overlays the display surface and is configured to direct images displayed on the display surface toward a first direction and a second direction distinct from the first direction.
- the first shutter device is configured to allow viewing of the display surface through the optical element from the first direction during the first time period, and block viewing of the display surface from the first direction during the second time period.
- the second shutter device is configured to allow viewing of the display surface through the optical element from the second direction during the second time period, and block viewing of the display surface from the second direction during the first time period.
- Fig. 1 is a perspective view of vehicle interior equipped with a dual view display system in accordance with one embodiment
- Fig. 2 is a top sectional view of a dual view display of Fig. 1 in accordance with one embodiment
- Fig. 3 is a block diagram of the dual view display system of Fig. 1 in accordance with one embodiment
- Fig. 4 is a timing diagram of an operation in the dual view display system of Fig. 1 in accordance with one embodiment
- Fig. 5 is a top sectional view of a dual view display of Fig. 1 in accordance with one embodiment.
- Fig. 6 is a perspective view of a dual view display of Fig. 1 in accordance with one embodiment.
- Figs. 1-2 illustrate a non-limiting example of a vehicle interior 12 equipped with a dual view display 11 located on a dashboard 22.
- the system 10 in this example is configured so as illustrated in Fig. 2 , a driver 14 may view a first image 34 from a first direction 16, and a passenger 18 may view a second image 36 different from the first image 34 from a second direction 20 that is different from the first direction 16.
- Such a dual view display system 10 may, for example, display navigation information as the first image 34 to the driver 14 while also displaying a movie as the second image 36 to the passenger 18.
- Fig. 2 illustrates a top sectional view of an embodiment of the dual view display 11 that includes a display device 24, an optical element 26, a first shutter device 28, and a second shutter device 30.
- Fig. 3 illustrates a block diagram as a non-limiting example of the dual view display system 10.
- the system 10 may include a controller 40 that may include a processor such as a microprocessor or other control circuitry as should be evident to those skilled in the art.
- the controller 40 may include memory, including non-volatile memory, such as electrically erasable programmable read-only memory (EEPROM) for storing one or more routines and captured data.
- the one or more routines may be executed by the processor to perform steps for determining if signals are received by the controller 40 for displaying images as described herein.
- the controller 40 may receive an image signal from a navigation system 42 that, for example, shows the present geographical location of the system 10.
- the controller 40 may also receive information regarding vehicle operating status from a vehicle information system 44.
- the vehicle operating status may include, for example, engine coolant temperature or vehicle interior heating and air conditioning settings.
- the controller 40 may also receive entertainment information from an entertainment system 46. Entertainment information may include a pre-recorded movie. For reasons of avoiding distracting the driver 14, it may be desirable that the movie information only be displayed to the passenger 16.
- entertainment information may include a pre-recorded movie. For reasons of avoiding distracting the driver 14, it may be desirable that the movie information only be displayed to the passenger 16.
- the dual view display system 10 may be used for non-vehicle applications where the controller 40 would receive signals from sources other than the systems 42, 44, and 46 suggested in Fig. 3 .
- the same image could be displayed to both the driver 14 and the passenger 18 so, for example, both persons could view navigational information.
- the display device 24 may be an organic light emitting diode (OLED) type device, or a liquid crystal display (LCD) type device, or any type of display capable of displaying images and having an image refresh rate sufficient for time-multiplexing the first image 34 and the second image 36 so each image has a sufficient update rate for what is being displayed. For example, if a movie is being displayed to the passenger 18, a refresh rate of 30 frames per second for the second image 36 may be desirable. If navigation information is being displayed to the driver 14, a refresh rate of 10 frames per second may be adequate. As such, for this example, a display device 24 with a refresh rate of at least 40 frames per second may be adequate.
- OLED organic light emitting diode
- LCD liquid crystal display
- OLED and LCD type devices are readily available with refresh rates of 60 frames per second are readily available and so would be suitable to use for the display device 24.
- the first image 34 and the second image 36 may be displayed every other frame so the refresh rate for the movie is adequate.
- the display device 24 was limited to 40 frames per second, the first image 34 showing navigation information could be displayed every fourth frame, while the second image 36 showing the movie would be displayed during the intervening three frames.
- the brightness of each frame is adjusted in accordance with the frame refresh rate. For example, if the passenger 18 turns the second image 36 off, the frame rate on the driver side may be increased and so the brightness of each frame displaying the first image 34 may need to be reduced to maintain the same brightness level as perceived by the driver 14. Fig.
- the display device 24 is configured to display a first image 34 on a display surface 32 during the first time period T1 and display a second image 36 on the display surface 32 during a second time period T2 distinct from the first time period T1.
- the first time period T1 and second time period T2 are preferably short enough so that by alternating the displaying the first image 34 and the second image 36, both images appear to the driver 14 and passenger 16 to be uninterrupted.
- any delay time T3 between the end of one time period and the start of a subsequent time period should be minimized so as to maximize the brightness of each image.
- the first time period T1 and the second time period T2 may both be about 16 milliseconds (ms), and the third time period T3 may be about 1ms.
- the first time period T1 and the second time period T2 do not need to be the same value.
- Fig. 2 further illustrates the optical element 26 as overlaying and contacting the display surface 32.
- the optical element 26 may be formed of a clear material such as glass or polymer. It will be appreciated that the material selected may be selected based on providing a particular index of refraction.
- the top view of the optical element 26 is depicted as having three planar faces defining a shape comparable to an isosceles triangle.
- the optical element 26 has a vertical height that corresponds to the height of the display surface 32, as depicted in Fig. 1 .
- the optical element 26 defines a first direction surface 26A oriented substantially normal or perpendicular to the first direction 16, a second direction surface 26B oriented substantially normal or perpendicular to the second direction 20, and a third direction surface 26C oriented substantially parallel to the display surface 32.
- substantially normal means that the corresponding viewing direction and direction surface are sufficiently normal so the image can be discerned by, for example, the driver 14, or the passenger 18.
- an optical element having a non-isosceles triangle shape or non-planer surfaces may also be useful for viewing the display surface 32.
- an optical element having a shape like a trapezoid may be used to display an image for viewing from a third direction such as from a position between the driver 14 and the passenger 18.
- Fig. 2 illustrates the optical element 26 being in contact with the display surface 32 which may be desirable to minimize optical degradation of the image.
- a polarizer, collimator, other type of filter, or an air gap may be present between the display device 24 and the display surface 32. It will be appreciated that the lateral alignment and distance between the optical device 26 and the display surface 32 is not particularly critical for the dual view display 11 described herein to operate as intended, as is the case for prior art dual view displays relying on parallax to determine the directions for optimal viewing of the prior art dual view displays.
- Fig. 2 illustrates the first shutter device 28 as overlying the first direction surface 26A and so is configured to allow viewing of the display surface 32 through first direction surface 26A of the optical element 26 from the first direction 16 during the first time period T1, and block viewing of the display surface 32 from the first direction 16 during the second time period T2.
- the second shutter device 30 is illustrated as overlying the second direction surface 26B and is operated to allow viewing of the display surface 32 through the optical element from the second direction 20 during the second time period T2, and block viewing of the display surface from the second direction during the first time period.
- the first shutter device 28 and the second shutter device 30 are generally operable to a transparent state and a blocking or opaque state.
- the shutter devices 28 and 30 may be formed using various technologies including, but not limited to, liquid crystal display (LCD), electrowetting, electrochromic glass, and electrically switchable transreflective mirrors (ESTM).
- the shutter devices 28 and 30 may have a single element sized to correspond to the surfaces 26A and 26B, or may have a plurality of elements so that portions of the display surface 32 can be independently viewed or blocked from being viewed. It will be appreciated that the shutter devices 28 and 30 do not need to be the same technology, and so it may be advantageous to have one shutter device be one technology, for example an ESTM, and the other shutter device be a different technology, for example an LCD.
- Fig. 2 shows a gap between the optical element 26 and the shutter devices 28 and 30 for the purposes of illustration. It will be recognized that the shutter devices 28 and 30 may be integrally formed with the optical element 24 using known processes.
- Fig. 5 illustrates another embodiment of a portion of the dual view display 11 wherein the display surface 32 is overlaid by an optical element 26 comprising of a plurality of prisms 52, each prism 52 having a top-view shape corresponding to an isosceles triangle. Similar to as described above, each prism 52 may have a shape other than an isosceles triangle, and may have a shape with more than three sides. Having a plurality of prisms 52 forming the optical element 26 is advantageous over the optical element illustrated in Fig. 2 because the overall depth of the display 11 is reduced, and so may not require recessing the display 11 into the dashboard 22 for aesthetic reasons as suggested in Fig. 2 . As such, each prism 52 defines a first direction surface 52A oriented substantially normal to the first direction 16, a second direction surface 52B oriented substantially normal to the second direction 20, and a third direction surface 52C oriented substantially parallel to the display surface 32.
- Fig. 6 illustrates an embodiment of a dual view display 11 where each prism 52 may be described as a vertically oriented prism having a height dimension 60 much larger than width dimensions 64, 66, and 68 of the respectively corresponding surfaces 52A, 52B, and 52C.
- the height dimension 60 of each prism 52 may correspond to the height of the display surface 32.
- Figs. 5 and 6 suggest that each prism 52 is aligned with a single pixel or column of pixels, for example pixels R, G, and B corresponding to red, green, and blue pixels respectively. However, the prisms 52 may be larger so that each of the prisms 52 has a width 68 that corresponds to more than one pixel.
- a prism 52 may be sized to have a width 68 that corresponds to ten (10) pixels, and so reduce the number of vertically oriented prisms 52 by a factor of 10.
- each prism 52 may have a height of only one or a few pixels of the display device 24, and so a plurality of rows may be necessary to cover the display surface 32.
- Each row of prisms 52 may be offset from rows above and below so the display 11 does not have the appearance of vertical lines extending the height of the display 11.
- each prism 52 may be sized to overlay an area of the display device 24 corresponding to a width of 10 pixels and a height of 10 pixels. It will be recognized that as the width 68 of each prism 52 approaches the width of one pixel, the alignment of each prism 52 with the edge of a pixel becomes more critical if the clarity and brightness of the images displayed is to be maintained.
- a first shutter device 54 may comprise a plurality of first shutter devices overlying each of the plurality of first direction surfaces 52A and a second shutter device 56 may comprise a plurality of second shutter devices overlaying each of the plurality of second direction surfaces 52B.
- a dual view display system 10 for displaying different images in different directions.
- a system 10 displaying two distinct images is provided for less cost than two separate displays.
- the arrangement of the display device 24, optical element 26, and two shutter devices 28 and 30 do not require precise physical alignment as is the case with other dual view displays, particularly those relying on parallax to control the direction that images are displayed.
- the full resolution of the display device is maintained for both images, unlike the parallax based dual view display devices that halve the resolution of each image relative to the resolution of the display to display two distinct images.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Business, Economics & Management (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Controls And Circuits For Display Device (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
- The invention generally relates to displays for displaying images or information, and more particularly relates to a system that time-multiplexes a single display with different images, and uses one or more optical elements in cooperation with light valves or shutter devices to display different images in different directions from the same display.
- Dual view displays capable of showing different images to distinct persons viewing the display from different directions have been proposed. Such displays can, for example, display navigation information to a vehicle operator while displaying a movie to a passenger. Some of the known dual view displays use a parallax barrier or patterned barrier to allow selected pixels on a display to be viewed from one direction and blocked when viewed from another direction. A description of such displays can be found in United States Patent Application Publication Number
2008/0001849 published Jan. 3, 2008 by Jin et al. and2008/0061305 published March 13, 2008 by Kim et al . Other dual view displays use a segmented backlighting source that directs light or emits light in a particular direction toward selected pixels by emitting light through apertures. The apertures are aligned with the pixels such that when the selected pixels are viewed from that particular direction, the selected pixels are more apparent than when viewed from another direction. A description of such a display can be found in United States Patent Number7,671,935 issued on March 2, 2010 to Mather et al . In general, prior art devices rely on parallax angles and interlacing of images to display distinct images in different directions, and so when two images are displayed the resolution of each image is half of the resolution of the display. Furthermore, the direction that each image is displayed depends on careful control of lateral alignment and separation distance between the pixels and the parallax barrier or segmented backlighting source. - Described herein is a dual view display system that uses an optical element overlaying the display to direct an image on the display in two distinct directions, and two shutter devices operated in coordination with multiplexing images on the display so distinct images can be displayed in the distinct directions.
- In accordance with one embodiment of this invention, a dual view display system is provided. The system includes a display device, an optical element, a first shutter device, and a second shutter device. The display device is configured to display a first image on a display surface during a first time period and display a second image on the display surface during a second time period distinct from the first time period. The optical element overlays the display surface and is configured to direct images displayed on the display surface toward a first direction and a second direction distinct from the first direction. The first shutter device is configured to allow viewing of the display surface through the optical element from the first direction during the first time period, and block viewing of the display surface from the first direction during the second time period. The second shutter device is configured to allow viewing of the display surface through the optical element from the second direction during the second time period, and block viewing of the display surface from the second direction during the first time period.
- Further features and advantages of the invention will appear more clearly on a reading of the following detailed description of the preferred embodiment of the invention, which is given by way of non-limiting example only and with reference to the accompanying drawings.
- The present invention will now be described, by way of example with reference to the accompanying drawings, in which:
-
Fig. 1 is a perspective view of vehicle interior equipped with a dual view display system in accordance with one embodiment; -
Fig. 2 is a top sectional view of a dual view display ofFig. 1 in accordance with one embodiment; -
Fig. 3 is a block diagram of the dual view display system ofFig. 1 in accordance with one embodiment; -
Fig. 4 is a timing diagram of an operation in the dual view display system ofFig. 1 in accordance with one embodiment; -
Fig. 5 is a top sectional view of a dual view display ofFig. 1 in accordance with one embodiment; and -
Fig. 6 is a perspective view of a dual view display ofFig. 1 in accordance with one embodiment. - In accordance with an embodiment of a dual
view display system 10,Figs. 1-2 illustrate a non-limiting example of avehicle interior 12 equipped with adual view display 11 located on adashboard 22. Thesystem 10 in this example is configured so as illustrated inFig. 2 , adriver 14 may view afirst image 34 from afirst direction 16, and apassenger 18 may view asecond image 36 different from thefirst image 34 from asecond direction 20 that is different from thefirst direction 16. Such a dualview display system 10 may, for example, display navigation information as thefirst image 34 to thedriver 14 while also displaying a movie as thesecond image 36 to thepassenger 18. By this arrangement, thesystem 10 appears to display two distinct images in two different directions for viewing by different persons at the same time from the same location on thedashboard 22, As such, thesystem 10 is distinguished from 3-D display systems that display two similar images for viewing by the same person from the same general direction.Fig. 2 illustrates a top sectional view of an embodiment of thedual view display 11 that includes adisplay device 24, anoptical element 26, afirst shutter device 28, and asecond shutter device 30. -
Fig. 3 illustrates a block diagram as a non-limiting example of the dualview display system 10. Thesystem 10 may include acontroller 40 that may include a processor such as a microprocessor or other control circuitry as should be evident to those skilled in the art. Thecontroller 40 may include memory, including non-volatile memory, such as electrically erasable programmable read-only memory (EEPROM) for storing one or more routines and captured data. The one or more routines may be executed by the processor to perform steps for determining if signals are received by thecontroller 40 for displaying images as described herein. As suggested in the illustration, thecontroller 40 may receive an image signal from anavigation system 42 that, for example, shows the present geographical location of thesystem 10. Thecontroller 40 may also receive information regarding vehicle operating status from avehicle information system 44. The vehicle operating status may include, for example, engine coolant temperature or vehicle interior heating and air conditioning settings. Thecontroller 40 may also receive entertainment information from anentertainment system 46. Entertainment information may include a pre-recorded movie. For reasons of avoiding distracting thedriver 14, it may be desirable that the movie information only be displayed to thepassenger 16. It will be appreciated that the dualview display system 10 may be used for non-vehicle applications where thecontroller 40 would receive signals from sources other than thesystems Fig. 3 . It will also be appreciated that the same image could be displayed to both thedriver 14 and thepassenger 18 so, for example, both persons could view navigational information. - Referring again to
Fig. 2 , thedisplay device 24 may be an organic light emitting diode (OLED) type device, or a liquid crystal display (LCD) type device, or any type of display capable of displaying images and having an image refresh rate sufficient for time-multiplexing thefirst image 34 and thesecond image 36 so each image has a sufficient update rate for what is being displayed. For example, if a movie is being displayed to thepassenger 18, a refresh rate of 30 frames per second for thesecond image 36 may be desirable. If navigation information is being displayed to thedriver 14, a refresh rate of 10 frames per second may be adequate. As such, for this example, adisplay device 24 with a refresh rate of at least 40 frames per second may be adequate. OLED and LCD type devices are readily available with refresh rates of 60 frames per second are readily available and so would be suitable to use for thedisplay device 24. With a refresh rate of 60 frames per second, thefirst image 34 and thesecond image 36 may be displayed every other frame so the refresh rate for the movie is adequate. If thedisplay device 24 was limited to 40 frames per second, thefirst image 34 showing navigation information could be displayed every fourth frame, while thesecond image 36 showing the movie would be displayed during the intervening three frames. In general, the brightness of each frame is adjusted in accordance with the frame refresh rate. For example, if thepassenger 18 turns thesecond image 36 off, the frame rate on the driver side may be increased and so the brightness of each frame displaying thefirst image 34 may need to be reduced to maintain the same brightness level as perceived by thedriver 14.Fig. 4 illustrates a timing diagram depicting a repeating sequence of alternating a first time period T1 and a second time period T2 separated by a delay time T3 for displaying thefirst image 34 and thesecond image 36 every other frame. In general, thedisplay device 24 is configured to display afirst image 34 on adisplay surface 32 during the first time period T1 and display asecond image 36 on thedisplay surface 32 during a second time period T2 distinct from the first time period T1. The first time period T1 and second time period T2 are preferably short enough so that by alternating the displaying thefirst image 34 and thesecond image 36, both images appear to thedriver 14 andpassenger 16 to be uninterrupted. In general, any delay time T3 between the end of one time period and the start of a subsequent time period should be minimized so as to maximize the brightness of each image. By way of a non-limiting example, the first time period T1 and the second time period T2 may both be about 16 milliseconds (ms), and the third time period T3 may be about 1ms. However, it will be appreciated that the first time period T1 and the second time period T2 do not need to be the same value. -
Fig. 2 further illustrates theoptical element 26 as overlaying and contacting thedisplay surface 32. Theoptical element 26 may be formed of a clear material such as glass or polymer. It will be appreciated that the material selected may be selected based on providing a particular index of refraction. The top view of theoptical element 26 is depicted as having three planar faces defining a shape comparable to an isosceles triangle. Theoptical element 26 has a vertical height that corresponds to the height of thedisplay surface 32, as depicted inFig. 1 . In this non-limiting example, theoptical element 26 defines afirst direction surface 26A oriented substantially normal or perpendicular to thefirst direction 16, asecond direction surface 26B oriented substantially normal or perpendicular to thesecond direction 20, and athird direction surface 26C oriented substantially parallel to thedisplay surface 32. It will be understood that if a viewing direction and display surface are not precisely normal there may be some degradation of the image. As used herein, substantially normal means that the corresponding viewing direction and direction surface are sufficiently normal so the image can be discerned by, for example, thedriver 14, or thepassenger 18. It will also be appreciated that an optical element having a non-isosceles triangle shape or non-planer surfaces may also be useful for viewing thedisplay surface 32. It should also be recognized that other polygons may be used to provide more than two viewing directions. For example, an optical element having a shape like a trapezoid may be used to display an image for viewing from a third direction such as from a position between thedriver 14 and thepassenger 18. -
Fig. 2 illustrates theoptical element 26 being in contact with thedisplay surface 32 which may be desirable to minimize optical degradation of the image. Alternately, a polarizer, collimator, other type of filter, or an air gap may be present between thedisplay device 24 and thedisplay surface 32. It will be appreciated that the lateral alignment and distance between theoptical device 26 and thedisplay surface 32 is not particularly critical for thedual view display 11 described herein to operate as intended, as is the case for prior art dual view displays relying on parallax to determine the directions for optimal viewing of the prior art dual view displays. -
Fig. 2 illustrates thefirst shutter device 28 as overlying thefirst direction surface 26A and so is configured to allow viewing of thedisplay surface 32 throughfirst direction surface 26A of theoptical element 26 from thefirst direction 16 during the first time period T1, and block viewing of thedisplay surface 32 from thefirst direction 16 during the second time period T2. Similarly, thesecond shutter device 30 is illustrated as overlying thesecond direction surface 26B and is operated to allow viewing of thedisplay surface 32 through the optical element from thesecond direction 20 during the second time period T2, and block viewing of the display surface from the second direction during the first time period. - The
first shutter device 28 and thesecond shutter device 30 are generally operable to a transparent state and a blocking or opaque state. Theshutter devices shutter devices surfaces display surface 32 can be independently viewed or blocked from being viewed. It will be appreciated that theshutter devices Fig. 2 shows a gap between theoptical element 26 and theshutter devices shutter devices optical element 24 using known processes. -
Fig. 5 illustrates another embodiment of a portion of thedual view display 11 wherein thedisplay surface 32 is overlaid by anoptical element 26 comprising of a plurality ofprisms 52, eachprism 52 having a top-view shape corresponding to an isosceles triangle. Similar to as described above, eachprism 52 may have a shape other than an isosceles triangle, and may have a shape with more than three sides. Having a plurality ofprisms 52 forming theoptical element 26 is advantageous over the optical element illustrated inFig. 2 because the overall depth of thedisplay 11 is reduced, and so may not require recessing thedisplay 11 into thedashboard 22 for aesthetic reasons as suggested inFig. 2 . As such, eachprism 52 defines afirst direction surface 52A oriented substantially normal to thefirst direction 16, asecond direction surface 52B oriented substantially normal to thesecond direction 20, and athird direction surface 52C oriented substantially parallel to thedisplay surface 32. -
Fig. 6 illustrates an embodiment of adual view display 11 where eachprism 52 may be described as a vertically oriented prism having aheight dimension 60 much larger thanwidth dimensions surfaces height dimension 60 of eachprism 52 may correspond to the height of thedisplay surface 32.Figs. 5 and6 suggest that eachprism 52 is aligned with a single pixel or column of pixels, for example pixels R, G, and B corresponding to red, green, and blue pixels respectively. However, theprisms 52 may be larger so that each of theprisms 52 has awidth 68 that corresponds to more than one pixel. For example aprism 52 may be sized to have awidth 68 that corresponds to ten (10) pixels, and so reduce the number of vertically orientedprisms 52 by a factor of 10. Alternatively, eachprism 52 may have a height of only one or a few pixels of thedisplay device 24, and so a plurality of rows may be necessary to cover thedisplay surface 32. Each row ofprisms 52 may be offset from rows above and below so thedisplay 11 does not have the appearance of vertical lines extending the height of thedisplay 11. For example, eachprism 52 may be sized to overlay an area of thedisplay device 24 corresponding to a width of 10 pixels and a height of 10 pixels. It will be recognized that as thewidth 68 of eachprism 52 approaches the width of one pixel, the alignment of eachprism 52 with the edge of a pixel becomes more critical if the clarity and brightness of the images displayed is to be maintained. - The arrangement of the
prisms 52 shown inFig. 5 and6 gives rise to a plurality of first direction surfaces 52A that are substantially parallel with each other, and a plurality of second direction surfaces 52B that are also substantially parallel with each other. As such, to effectively block or allow viewing of an image from a direction, afirst shutter device 54 may comprise a plurality of first shutter devices overlying each of the plurality of first direction surfaces 52A and asecond shutter device 56 may comprise a plurality of second shutter devices overlaying each of the plurality of second direction surfaces 52B. - ccordingly, a dual
view display system 10 for displaying different images in different directions is provided. By using an optical element and two shutter devices, asystem 10 displaying two distinct images is provided for less cost than two separate displays. The arrangement of thedisplay device 24,optical element 26, and twoshutter devices
Claims (10)
- A dual view display system (10) comprising:a display device (24) configured to display a first image on a display surface (32) during a first time period and display a second image distinct from the first image on the display surface (32) during a second time period distinct from the first time period;an optical element (26) overlaying the display surface (32), said optical element (26) configured to direct images displayed on the display surface (32) toward a first direction and a second direction distinct from the first direction;characterised bya first shutter (28) device configured to allow viewing of the display surface (32) through the optical element (26) from the first direction during the first time period, and block viewing of the display surface (32) from the first direction during the second time period; anda second shutter device (30) configured to allow viewing of the display surface(32) through the optical element (26) from the second direction during the second time period, and block viewing of the display surface (32) from the second direction during the first time period.
- The system (10) in accordance with claim 1, wherein the optical element (26) defines a first direction surface (26A) oriented substantially normal to the first direction, a second direction surface (26B) oriented substantially normal to the second direction, and a third direction (26C) surface oriented substantially parallel to the display surface (32).
- The system (10) in accordance with claim 2, wherein the first shutter device (28) overlays the first direction surface (26A) and the second shutter device (30) overlays the second direction surface (26B).
- The system (10) in accordance with claim 1, wherein the optical element (26) comprises a plurality of prisms (52), wherein each prism defines a first direction surface (26A) oriented substantially normal to the first direction, a second direction surface (26B) oriented substantially normal to the second direction, and a third direction surface (26C) oriented substantially parallel to the display surface (32).
- The system (10) in accordance with claim 4, wherein each of the plurality of prisms (52) is a vertically oriented prism.
- The system (10) in accordance with claim 4, wherein the first shutter device (28) overlays each of the plurality of first direction surfaces (26A) and the second shutter device (30) overlays each of the plurality of second direction surfaces (26B).
- The system (10) in accordance with claim 1 and 6, wherein the first shutter device (28) comprises a first liquid crystal device (LCD), and the second shutter device (30) comprises a second LCD device.
- The system (10) in accordance with claim 1, wherein the first shutter device (28) comprises a first electrowetting type device, and the second shutter device (30) comprises a second electrowetting type device.
- The system (10) in accordance with claim 1, wherein the first shutter device (28) comprises a first electrochromic glass device, and the second shutter (30) device comprises a second electrochromic glass device.
- The system (10) in accordance with claims 7-9, wherein the first shutter device (28) uses a different technology than the second shutter device (30) and wherein the technologies are elektrochromic glass or electrowetting or LCD
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/852,647 US20120032872A1 (en) | 2010-08-09 | 2010-08-09 | Dual view display system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2418864A2 true EP2418864A2 (en) | 2012-02-15 |
EP2418864A3 EP2418864A3 (en) | 2014-02-19 |
Family
ID=44644951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11175512.0A Withdrawn EP2418864A3 (en) | 2010-08-09 | 2011-07-27 | Dual view display system |
Country Status (2)
Country | Link |
---|---|
US (1) | US20120032872A1 (en) |
EP (1) | EP2418864A3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015077272A1 (en) * | 2013-11-19 | 2015-05-28 | 3M Innovative Properties Company | Dual viewing film and dual view display apparatus using the same |
WO2017055426A1 (en) * | 2015-10-01 | 2017-04-06 | Mang, Martin | Image display device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2979515B3 (en) * | 2011-12-29 | 2013-09-27 | Samsung Electronics Co Ltd | DISPLAY APPARATUS AND METHODS OF CONTROLLING THE SAME |
US9551872B1 (en) | 2013-12-30 | 2017-01-24 | Google Inc. | Spatially multiplexed lens for head mounted display |
US9671612B2 (en) * | 2014-01-29 | 2017-06-06 | Google Inc. | Dynamic lens for head mounted display |
JP7375621B2 (en) * | 2020-03-09 | 2023-11-08 | 株式会社デンソー | Automotive display device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080001849A1 (en) | 2006-06-28 | 2008-01-03 | Lg. Philips Lcd Co., Ltd. | Dual-view display device and method of driving the same |
US20080061305A1 (en) | 2006-09-12 | 2008-03-13 | Tae-Woo Kim | Dual view display panel |
US7671935B2 (en) | 2005-05-19 | 2010-03-02 | Sharp Kabushiki Kaisha | Display |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4790636A (en) * | 1986-12-18 | 1988-12-13 | Ford Motor Company | Method of forming a counter electrode for an electrochromic optical shutter |
JP2000036927A (en) * | 1998-07-17 | 2000-02-02 | Sanyo Electric Co Ltd | Display device for plural video images |
US6443579B1 (en) * | 2001-05-02 | 2002-09-03 | Kenneth Myers | Field-of-view controlling arrangements |
US20050253789A1 (en) * | 2002-06-20 | 2005-11-17 | Hiroshi Ikeda | Display |
JP4845893B2 (en) * | 2004-01-20 | 2011-12-28 | シャープ株式会社 | Directional backlight and multi-view display devices |
WO2005078514A1 (en) * | 2004-02-13 | 2005-08-25 | Mitsubishi Denki Kabushiki Kaisha | Liquid crystal display apparatus and information device |
EP1811362A4 (en) * | 2004-10-27 | 2011-07-27 | Fujitsu Ten Ltd | Display |
EP1817088B1 (en) * | 2004-11-24 | 2014-06-25 | Koninklijke Philips N.V. | Privacy overlay for interactive display tables |
EP1929355B1 (en) * | 2005-09-21 | 2013-11-06 | Koninklijke Philips N.V. | Display device |
JP5291469B2 (en) * | 2005-12-21 | 2013-09-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Backlight structure |
EP1988538B1 (en) * | 2006-02-22 | 2014-07-23 | Fujitsu Ten Limited | Display device and display method |
US7636187B2 (en) * | 2006-12-14 | 2009-12-22 | Sony Corporation | Optical shutter for display device, image display apparatus, and apparatus and method for manufacturing the optical shutter |
US8362992B2 (en) * | 2010-07-21 | 2013-01-29 | Delphi Technologies, Inc. | Dual view display system using a transparent display |
-
2010
- 2010-08-09 US US12/852,647 patent/US20120032872A1/en not_active Abandoned
-
2011
- 2011-07-27 EP EP11175512.0A patent/EP2418864A3/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7671935B2 (en) | 2005-05-19 | 2010-03-02 | Sharp Kabushiki Kaisha | Display |
US20080001849A1 (en) | 2006-06-28 | 2008-01-03 | Lg. Philips Lcd Co., Ltd. | Dual-view display device and method of driving the same |
US20080061305A1 (en) | 2006-09-12 | 2008-03-13 | Tae-Woo Kim | Dual view display panel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015077272A1 (en) * | 2013-11-19 | 2015-05-28 | 3M Innovative Properties Company | Dual viewing film and dual view display apparatus using the same |
WO2017055426A1 (en) * | 2015-10-01 | 2017-04-06 | Mang, Martin | Image display device |
Also Published As
Publication number | Publication date |
---|---|
US20120032872A1 (en) | 2012-02-09 |
EP2418864A3 (en) | 2014-02-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2472308B1 (en) | Dual view display system | |
EP2429207B1 (en) | Dual view display system | |
EP2418864A2 (en) | Dual view display system | |
US8502761B2 (en) | Transparent component with switchable reflecting elements, and devices including such component | |
JP5610977B2 (en) | Display control device | |
EP2317495B1 (en) | Multi-view display | |
EP1777097B1 (en) | A display system for displaying images within a vehicle | |
US20190373249A1 (en) | Stereoscopic display device and head-up display | |
JP4333878B2 (en) | Multi-view directional display | |
US20160173867A1 (en) | Image display apparatus | |
US9240146B2 (en) | Liquid crystal display device and driving method therefore as well as electronic apparatus | |
US20120086776A1 (en) | 3D display system with active shutter plate | |
US20080084519A1 (en) | Stereoscopic 3d liquid crystal display apparatus with scanning backlight | |
US20130077037A1 (en) | Liquid crystal grating module and two dimension-three dimension switchable liquid crystal display device using the same | |
US20120320291A1 (en) | Transparent 3d display system | |
KR100765131B1 (en) | Parallax barrier lcd which has wide viewing angle | |
US20130176203A1 (en) | Display apparatus and method of displaying three-dimensional image using the same | |
US10228569B2 (en) | Display device | |
US9329389B2 (en) | Projection type display device for vehicles | |
US20150237334A1 (en) | Stereoscopic display device | |
KR100828696B1 (en) | Variable parallax barrier and stereoscopic parallax barrier lcd | |
KR100908677B1 (en) | 3D image display device and stereoscopic image display method using display pixel change | |
US11054641B2 (en) | Image generating device for screen and head-up display | |
CN115524862A (en) | Naked eye 3D display device and vehicle | |
JP2007334107A (en) | Display element |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H04N 13/04 20060101AFI20140113BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20140820 |